Finally, some lore for these ladies (will continue on next post):Idea for Dominique is for her to be my "Hopelessly unaware character". She's super intro microphilia, but she lived to medieval standards since she was born with some small access to basic magic she was taught in the past by some undefined teacher.
Kaaly pretty much fell in love with that Doe's "magnificent spotted ass of hers" (yes, that's the canon xD) and decided it would be funny if she would get what she wants... but in a more subtle way.
Dominique is unaware of what a planet is. She doesn't really understand what a modern city is either, as she never really experienced contacts with modern society.
Kaaly used this to create a situation where she'll live in this isolated place (making sure nobody she doesn't want to will ever find it), a hut in the woods, provide everything she needs, and make her conveniently find tiny worlds in the surrounding area in the woods. To her amusement, the Doe doesn't really understand what they are. She just knows they're pretty and they feel really good to use for her "me times".
She also make her find "convenient" pieces of magic knowledge to craft potions giving all sorts of effects, will it be that they really work or that she just apply the intended effect when consumed.
To not force her into a cruel existence completely alone, eventually she introduced the YCHsquad to her. There to do whatever she wants, will it be helping tidying around, testing her potions, of having the most crazy lewd sessions. The mice are only a recent addition. Two birds with one stone: Dominique gets more friends, The mice gets one big sis taking care of them and everything they ever dreamt for to be giantesses themselves.
Dominique has never met Kaaly, nor she's aware of her existence. But the others do. The mice were briefed their first night there by her, never to make the big girl realize what the true nature of her "toys" is, or it will spoil the fun. In return, they are literally allowed to do whatever they want without consequences.